On Mon, 25 Nov 2002, John Myers wrote:
> Davide Libenzi writes:
> > 1) Move the wake_up() call done inside the poll callback outside the lock
>
> You can't. You need to hold the lock over the callback or your callback
> could end up accessing a freed epitem.
No, look at the code :
http://www.xmailserver.org/linux-patches/sys_epoll-2.5.49-0.58.diff
The function ep_collect_ready_items() increases the usage count under
lock. So the epintem is protected, and the file* cannot desappear because
of the read lock on epsem.
- Davide
-
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